In the third and final interview session, conducted on November 23, 1982, Sundeleaf continues discussing his involvement with the Historic American Buildings Survey and describing some of the buildings he surveyed. He also talks about the organizational structure of the survey in Oregon. He then revisits the topic of running his own architectural firm and some of the buildings he designed. He shares his thoughts about modern architecture and talks about the buildings in downtown Portland. He closes the interview by discussing designing war housing during World War II.